Fuel-pump.



H. LEMP.

Patented Dec. 28, 1915.

3 SHEETS-SHEET I.

H. LEMP mm X: 0,

lnvwwtoq 3 SHEETS-SHEET 2.

Patented Dec. 28, 1915.

H. LEMP.

FUEL PUMP.

APPLICATION FILED SEPT. 17, 1912.

Patented Dec. 28; 1915.

3 SHEETSSHEET 3.

Wbmassag: imventwri;

Her-mamn Lamp 9 HERD/[ANN LEMP, OF ERIE, PENNSYLVANIA, ASSIGNOR TOGENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

FUEL-PUMP.

Application filed September 1'7, 1912.

To (/21 119720222. it may eon/ m.

Be it known that T, HERMAXX LnMP, a citizen oi the United States,residing at lflrie, county of Erie, State of Pennsylvania, have inventedcertain new and useful Tmprovernents in Fuel-Pumps, of which thefollowing is a specification.

This invention relates to internal combustion engines. and especially tothose in which liquid tuel is ted to the cylinders under pressure. andis ignited in the cylinders by the high temperature of air compressedtherein to a heavy pressure. The object of the invention is to enablethe speed of such an engine to be regulated and maintained at or nearconstant speed by varying the quantity ot" fuel supplied to thecylinders. To this end I provide a fuel pump whose capacity can bevaried by a speed responsive device driven by the engine. The pump has aconstant stroke and the fuel is delivered to it h v a measuring devicecontrolled by the speed responsive device.

Tn thw accompanying drawings. Figure 1 is a side elevation showingcertain parts in section: Fig. 2 is a front view; Fig. 3 is a section onthe line 3 3. Fig. 1: Fig. 4 is a plan view: Fig. 5 is a side view otthe plungers used to measure the oil: and Fig. (l is an end view of thesamev The engine has a speed governor 1 driven by the upright shatt 2 onwhich are two gears 3 and i. The upper one engages a gear 5 on a shaft(3 which carries an eccentric T actuating a rocking frame F A crossbaron said trame is provided with adjust able tappets, such as the setscrews 9. which bear upon the upper ends ot the pump plungers and impartto them a downward forcine stroke at each downward movement ame. Springs'11 hit the plunger-s 1 frame moves upward. The pump d has our plungers.but the munbcr wilt ary to corresspond with the number oi cyli ders inthe engine. each cylinder 0 .indiviuual pump plnug in The cylinders inwhich the pump plan 51ers work are supi ilicd with fuel through ou i lleading down from basins 14-. :rrangcd in a row beneath a measuringdevice which, feeds predetermined ianti'ties 1 fuel into them inaccordance with the i Tl e measuring deharm mands upoi the en inc. vicewhi r to employ census oi a Specification of Letters Patent.

'l atcnted time. 2%, 1915.

Serial No. 720.771.

rotary multiple valve set in a casing in the bottom of an oil tank 15 towhich a supply of fuel is furnished through a pipe 16 con trolled l afloat valve 17.

The bottom oi the tank has a cylindrical casinglb open along its top andbottom and arranged directly above and parallel with therow oi basins H.in said casing fits a cylinder 19 keyed upon a sleeve 19 on one end ofwhich is a gear 20 meshing with the gear -l. so that said sleeve andcylinder rotate in synehronism with the governor shaft 2. In the sidesoi the cylinder 19 and spaced 90 degrees apart. are tour longitudinalgrooves 21 in each of which is a plunger 2). The grooves terminate atdill'erent points ,along the cylinder. one over each of the basins It.All the plungers extend out beyond one end of the cylinder and areattached to a disk 23. spindle 24 runs centrally through the sleeve 19'and is secured to the disk 23. At its other end it is engaged by a Fork25 on a hell-crank .lever 26 which is linked to the arm 27 oi the speedgovernor.

The operatioi'r is as tollows: The speed governor shifts the plunger-s22 in their grooves so that the open portions 28 of said grooves betweentheir ends and the ends of their plungers are longer or shorter. as thecase may be. These portions '29 successively fill with oil as thecylinder 19 in its rotation brings them up to the open upper part of thecasing 18. The rotation of the cylinder then. carries them downward. thecharge of oil .in each portion being trapped by the wall oi the casinguntil the open lower portion is reached. when the oil drops into itsrespective basin 1-4 and runs down the duct '13 to the corrcspmidingpump plunger. The ump has a constant stroke but the plungers 10 candeliver to the engine cylinders only the quantity oi lucl supplied bythe meats uring device. ll-the load increases the tall.- ing governorweights will retract the plnngcrs 22 and lengthen the open portions ofthe grooves. so that more lucl will he ted to the engines. The oppositeetl 'ect takes place it the load drops oil.

in accordance with the provisions of i :t patent statutes. l have descriaal the princi ple ol' operation oi "my invention. together with theapparatus which i now consider to represent the best ciohodimcuithercoi': but i desire to have it ll 'itltlfi't itui that l OF. UL!

apparatus shown is only illustrative, and that the invention can becarried out by other means.

hat I claim as new and desire to secure by Letters Patent of the UnitedStates, is

l. The combination with an internal combustion engine provided with aspeed governor, of a fuel pump connected with a moving part of theengine having a constant stroke, a conduit for fuel connected with saidpump, a fuel tank above said conduit, and means controlled by the speedgovernor for transferring measured quantities of fuel varying with theload on the engine from said tank into saidconduit.

2. The combination with an internal coin bustion engine provided with aspeed governor, of a fuel pump connected with a moving part of theengine having a constant stroke, a conduit connected with said pump, afuel tank above said conduit, a measuring device interposed between saidtank and conduit for feeding charges of fuel by gravity into saidconduit, and means controlled by the speed governor for varying thequantity of each charge in accordance with the load on the engine.

3. The combination with an internal coinbustion engine provided with aspeed governor, of a fuel pump connected with a mov ing part of saidengine having a constant stroke, a conduit for fuel connected with saidpump, and a rotary measuring device geared to the speed governor shaft,and controlled by said governor. for positively conveying varyingquantities of fuel to said conduit in accordance with the load on theengine.

l. The combination with an internal coinbustion engine provided with aspeed gov ernor, of a fuel pump connected with a moving part of saidengine having a constant stroke, a conduit for fuel connected with saidpump, a fuel tank, a constantly rotating valve in the bottom of saidtank, and means controlled by the speed governor for causing said valveto measure out varying supplies of fuel into said conduit in accordancewith the load on the engine.

5. The combination with an internal combustion engine provided with aspeed governor, of a fuel pump connected with a moving part of saidengine having a constant stroke, a fuel tank, a constantly rotatingcylindrical valve in the bottom of said tank having longitudinal groovesfor feeding fuel to said pump, and means controlled by the speedgovernor for varying the length of the open portions of said grooves.

6. The combination with an internal combustion engine provided with aspeed governor, of a fuel pump connected with a moving part of saidengine having a constant stroke, a fuel tank, a constantly rotatingcylindrical valve in the bottom of said tank having longitudinal groovesfor feeding fuel to said pump, plunger-s movable lengthwise in saidgrooves. and connections between said plungers and the speed governor ofsaid engine.

7. The combination with an internal combustion engine. of a fuel pumpcomprising a cylinder and a piston, means connecting with the movingpart of said engine for imparting a stroke of constant length to thepistol], a source of fuel supply, a measuring device for transferringmeasured quantities of fuel from said source to the cylinder. and agovernor for regulating the action of said measuring device inaccordance with the speed of said engine.

8. The combination with an internal combustion engine provided with aspeed governor, of a fuel pump having its plunger connected with amoving part of said engine and having a constant length of stroke. aconduit for conveying fuel to the suction side of said pump, a measuringpump also driven by the engine for discharging measured quantities offuel to said conduit. a governor for the engine. and regulatingmechanism for said measuring pump controlled by said governor.

In witness whereof. I have hereunto set my hand this thirteenth day ofSeptember. 1912.

HERMANN Ll lMl.

Vitnesses ()TTO F. PEKSSON, 'Fizaxk G. Harris.

